On 09/24/2013 03:14 PM, Karel Walters wrote:

Hi Phil,

quoted

Ok, so your create operation will be:

mdadm --create /dev/md1 --level=10 -n 6 --layout=f2 --chunk=64
--data-offset=variable /dev/sdd1:2048 /dev/sdg1:4096 /dev/sdf1:2048
/dev/sdb1:2048 /dev/sdc1:2048 /dev/sde1:2048

No --assume-clean?

Whoops!  Yes, add the --assume-clean.

quoted

I'm actually guessing that /dev/sdb1 and /dev/sdc1 need offset 2048 like
the original devices, not the 4096 of a device added later (newer
mdadm).  With the mixed offsets, you need mdadm version 3.3.

I created and used it this with mdadm 3.2.5, do I really need to get 3.3?

Yes, 3.2.5 doesn't have the variable offset syntax.

Phil